The Istec SpeedSys 200 is a high-integrity, SIL 2-certified overspeed protection module designed to provide a reliable and economical solution for protecting rotating equipment such as compressors, pumps, and microturbines . Its robust design features advanced self-monitoring and galvanically separated inputs and outputs, ensuring safe and dependable operation .

The module offers a fast hardware response time of 8ms via its two double-pole single-throw safety relays, and also includes one safety analog output. It accepts input from three separate sensors, though only one sensor input is used at a time. Compatible sensor types include Hall-effect, electromagnetic, and proximity sensors, covering a wide frequency range from 0.025 Hz to 35 kHz with an outstanding accuracy of 0.05%. The isolated inputs are certified for ATEX/IECEx Zone 0,1,2 (Ex ia), removing the need for external isolators and simplifying installation .

The SpeedSys 200 is designed for minimal maintenance, supporting automated proof-tests with intervals of up to 10 years . Its compact technical footprint allows for flexible mounting in field enclosures or control rooms. For applications requiring higher availability or specific voting logic, multiple SpeedSys 200 modules can be combined to create redundant or TMR (Triple Modular Redundant) configurations .